refactor: test mocks (#16008)

server/test/repositories/media.repository.mock.ts

@@ -1,7 +1,8 @@
-import { IMediaRepository } from 'src/types';
+import { MediaRepository } from 'src/repositories/media.repository';
+import { RepositoryInterface } from 'src/types';
 import { Mocked, vitest } from 'vitest';
 
-export const newMediaRepositoryMock = (): Mocked<IMediaRepository> => {
+export const newMediaRepositoryMock = (): Mocked<RepositoryInterface<MediaRepository>> => {
   return {
     generateThumbnail: vitest.fn().mockImplementation(() => Promise.resolve()),
     generateThumbhash: vitest.fn().mockResolvedValue(Buffer.from('')),